Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

35151 Products showing for Fuses & Circuit Breakers

250 of 999+
Temporarily out of stock
Phoenix Contact Surge Protector, 8A, Plug In Mount
  • RS Stock No. 890-3792
  • Mfr. Part No. 2800906
Each
$111.95(exc. GST)
In Stock
Mersen 315mA Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-827
  • Mfr. Part No. L090538Q
1 Box of 10
$15.04(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-627
  • Mfr. Part No. 3VA6560-7KL42-2AA0
Each
$17,715.37(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 500mA Curve D, 400V AC, 70 kA Breaking Capacity
  • RS Stock No. 610-617
  • Mfr. Part No. 5SY8405-8
Each
$747.54(exc. GST)
Temporarily out of stock
Bourns 1.1A Resettable Fuse, 6V
  • RS Stock No. 647-8213
  • Mfr. Part No. MF-MSMF110-2
Each (In a Pack of 10)
$0.508(exc. GST)
Temporarily out of stock
Eaton Extension Connector for use with N4-4, NZM4-4
  • RS Stock No. 246-277
  • Mfr. Part No. 132674 NZM4-4-XKV95-2KB
Each
$1,358.81(exc. GST)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 2A Current Rating
  • RS Stock No. 275-0419
  • Mfr. Part No. M39019/02-219
Each
$1,583.97(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1A, 250V
  • RS Stock No. 767-5112
Each (In a Pack of 10)
$1.44(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 201-6558
  • Mfr. Part No. 2906840
Each
$47.59(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 700A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-508
  • Mfr. Part No. 3VA5570-6EC36-0AA0
Each
$9,194.02(exc. GST)
Temporarily out of stock
Siemens 1 Phase Surge Arrester, 100kA, 800V (Volts), Screw Mount Mount
  • RS Stock No. 299-997
  • Mfr. Part No. 5SD7411-2
Each
$1,481.02(exc. GST)
In Stock
Phoenix Contact Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 768-1192
  • Mfr. Part No. 2762265
Each
$574.68(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2739
  • Mfr. Part No. 2906824
Each
$315.35(exc. GST)
In Stock
Eaton 1A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8409P
  • Mfr. Part No. C14G1
Each (Supplied in a Box)
$5.941(exc. GST)
Temporarily out of stock
Siemens ALPHA Cover
  • RS Stock No. 626-981
  • Mfr. Part No. 8GK9601-1KK31
1 Pack of 10
$920.26(exc. GST)
Temporarily out of stock
Eaton 125A Fuse Holder for 22.2 x 58mm Fuse, 1P, 700/1000V ac/dc
  • RS Stock No. 228-939
  • Mfr. Part No. CH221DU 1P 22x58 Fuse Holder
1 Pack of 6
$389.88(exc. GST)
Temporarily out of stock
Socomec 1 Phase Industrial Surge Protector, 40kA
  • RS Stock No. 224-2518
  • Mfr. Part No. 49821424
Each
$759.00(exc. GST)
Temporarily out of stock
Eaton 50A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 244-328
  • Mfr. Part No. 12TDLEJ50
Each
$449.01(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Undervoltage Release for use with N(S)2(-4), N(S)3(-4), NZM2(-4), NZM3(-4)
  • RS Stock No. 254-778
  • Mfr. Part No. 259515 NZM2/3-XU110-130DC
Each
$373.78(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3806
  • Mfr. Part No. 3VA2340-6KP42-0AA0
Each
$6,681.51(exc. GST)
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